I don't know about you, but I would have traded that soap for more of
"1 Container of Matches" or desalination gear for more than "8 pints".

Maybe McD-D were expecting their craft to crash-land somewhere tropical, so
they packed that soap to ensure the astronauts wouldn't repel the
admiring female lovelies.

I love well-written manuals, and the Mercury familiarisation
manual is a pretty nice example with great diagrams and drawings.
Pity that there's nothing comparable for
Vostok and Soyuz (and even if it weren't classified it would be in Russian,
which I don't understand more than a few words of...)